<wicket:panel xmlns:wicket="http://wicket.apache.org">
    <li>
        <a  href="#" class="tree-toggle closed" data-toggle="branch" data-value="Bootstrap_Tree" id="nut2">
            <i wicket:id="name"></i>
        </a>
        <ul class="branch">
            <div wicket:id="TreeNoChildNodePanel"></div>
        </ul>
    </li>
    <div wicket:id="menu" style="width: 200px;" class="alert alert-info"></div>
</wicket:panel>